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Overview
| Topology | Flyback Converter |
| Input voltage | 90-265 V |
| Switching frequency | 100-1000 kHz |
| Output 1 | 20 V / 3 A |
Description
This design notes describes a 60 W universal input 5 V, 9 V, 12 V, 15 V and 20 V output evaluation board for laptop adapters. This featured power supply is an active-clamp flyback topology utilizing ON Semiconductor’s NCP1568 PWM controller, NCP51530 HB Driver, NCP4305 SR Controller and FDMS86202 SR FET. This design note provides complete circuit schematic, PCB, BOM and transformer information of the evaluation board. It also provide efficiency, transient response, output ripple and thermal data of the evaluation board.
Features
- Universal AC input operation (90 -265 Vac)
- High full load and average efficiency
- Low standby power
- Very low ripple and noise
- High frequency operation up to 450 kHz
- Inherent SCP and OCP protection
- Thermal and OVP protection
- Adaptive frequency operation based on AC input and output load conditions
- Adaptive ZVS operation.
- Smaller EMI components.
- Multiple probe points for evaluation
- Smooth startup operation
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | VR(V (AC)) | Safety Class | dV/dt(V/µs) | DF @ 1 kHz(%) | RISO | Pitch(mm) | W(mm) | H(mm) | Packaging | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC(mΩ) | fres(MHz) | Material | Interface Type | Type | Gender | Pins | Mount | PCB Thickness(mm) | IR(A) | Working Voltage(V (DC)) | G(mm) | Operating Temperature | Poles | L(mm) | Vaporphase process | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WCAP-FTXX Film Capacitors, Across the mains, 220 nF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-FTXX Film Capacitors | Capacitance220 nF | Rated Voltage310 V (AC) | Safety ClassX2 | Rate of Voltage Rise300 V/µs | Dissipation Factor0.1 % | Insulation Resistance30 GΩ | Pitch10 mm | Width8 mm | Height14 mm | PackagingBulk | – | – | – | – | – | – | – | – | – | – | – | MountBoxed THT | – | – | – | Pin length18 mm | Operating Temperature -40 °C up to +105 °C | – | Length13 mm | – | ||||
 | WR-USB Type C Connectors, USB 3.1, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-USB Type C Connectors | – | – | – | – | – | Insulation Resistance1000 MΩ | – | – | – | PackagingTape and Reel | – | – | – | – | – | – | – | Interface TypeType C | TypeHorizontal | GenderReceptacle | Pins24 | MountTHR | PCB Thickness1.6 mm | Rated Current5 A | Working Voltage48 V (DC) | Pin length1.9 mm | Operating Temperature -40 °C up to +105 °C | – | – | – | |||
 | WE-HCI SMT Flat Wire High Current Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCI SMT Flat Wire High Current Inductor | – | – | – | – | – | – | – | Width6.9 mm | Height4.8 mm | – | Inductance2 µH | Performance Rated Current13.8 A | Saturation Current @ 10%4.5 A | Saturation Current @ 30%9 A | DC Resistance5.85 mΩ | Self Resonant Frequency68 MHz | MaterialSuperflux | – | – | – | Pins2 | MountSMT | – | – | – | – | Operating Temperature -40 °C up to +150 °C | – | Length7 mm | – | ||||
 | WR-PHD Pin Header - Single, –, – | Simulation– | Downloads7 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | – | – | – | – | Insulation Resistance1000 MΩ | Pitch2.54 mm | – | – | PackagingBag | – | – | – | – | – | – | – | – | TypeAngled | GenderPin Header | Pins2 | MountTHT | – | Rated Current3 A | Working Voltage250 V (DC) | – | Operating Temperature -40 °C up to +105 °C | – | Length5.08 mm | – | ||
 | WR-PHD Pin Header - Single, –, – | Simulation– | Downloads7 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | – | – | – | – | Insulation Resistance1000 MΩ | Pitch2.54 mm | – | – | PackagingBag | – | – | – | – | – | – | – | – | TypeAngled | GenderPin Header | Pins4 | MountTHT | – | Rated Current3 A | Working Voltage250 V (DC) | – | Operating Temperature -40 °C up to +105 °C | – | Length10.16 mm | – | ||
 | WS-DISV Small Compact SMT Flat Actuator with Top Tape 1.27 mm, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | – | Rated Voltage24 V (AC) | – | – | – | Insulation Resistance100 MΩ | Pitch1.27 mm | – | – | PackagingTape and Reel | – | – | – | – | – | – | – | – | – | – | Pins4 | – | – | – | – | – | Operating Temperature -40 °C up to +85 °C | Poles4 | Length6.25 mm | Vaporphase processYes | ||||
750317295 | Offline Transformer, –, – | Simulation– | Downloads– | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Offline Transformer | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |